Does Dark Matter Exist?

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Maybe Newtonian physics doesn’t need dark matter to work.

“There are no ‘dark matter people’ and ‘MOND people,’ ” his colleague retorted.

“I am ‘MOND people,’” Milgrom proudly proclaimed, referring to Modified Newtonian Dynamics, his theory that fixes Newtonian physics instead of postulating the existence of dark matter and dark energy—two things that, according to the standard model of cosmology, constitute 95.1 percent of the total mass-energy content of the universe.